Cinder

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Cinder

A cinder is a pyroclastic

Pyroclastic rock

Pyroclastic rocks or pyroclastics are clastic rocks composed solely or primarily of volcanic materials. Where the volcanic material has been transported and reworked through mechanical action, such as by wind or water, these rocks are termed volcaniclastic....
material. Cinders are extrusive igneous rock

Igneous rock

Igneous rock is one of the three main Rock types . Igneous rock is formed by magma being cooled and becoming solid . They may form with or without crystallization, either below the surface as Intrusion rocks or on the surface as extrusive rocks....
s. Cinders are similar to pumice

Pumice

File:Pumice stone444.jpgFile:Pumice stone detail444.jpgPumice is a textural term for a volcanic rock that is a solidified frothy lava typically created when super-heated, highly pressurized rock is violently ejected from a volcano....
, which has so many cavities and is such low-density that it can float on water.

following geologic

Geology

Geology is the science and study of the solid and liquid matter that constitute the Earth. The field of geology encompasses the study of the composition, structural geology, physical properties, dynamics, and History of the Earth of Earth materials, and the processes by which they are formed, moved, and changed....
characteristics define a cinder:

ers have been used on track surfaces and roads to provide additional traction in winter conditions.

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Characteristics

The following geologic

Geology

Uncemented
Vitric
Having bubble-like cavities, called vesicles
Measuring not less than 2.0 millimeters in at least one dimension
Apparent specific gravity
Specific gravity

Specific gravity is defined as the ratio of the density of a given solid or liquid substance to the density of water at a specific temperature and pressure, typically at 4?C and , making it a dimensionless quantity ....
between 1.0 and 2.0
Typical cinders are red or black in color.

Uses

Cinders have been used on track surfaces and roads to provide additional traction in winter conditions. Cinders are also popularly employed as inorganic mulch in xeriscaping

Xeriscaping

Xeriscaping and xerogardening refers to Landscape architecture and gardening in ways that reduce or eliminate the need for supplemental irrigation....
, because of excellent drainage properties and resistance to erosion. In this context, they are referred to frequently with the synonym "lava rock".

Cinder

Characteristics

Uses

See also